/*
 * Copyright (C) 2011-2015 GUIGUI Simon, fyhertz@gmail.com
 *
 * This file is part of libstreaming (https://github.com/fyhertz/libstreaming)
 *
 * Spydroid is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.
 *
 * This source code is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this source code; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

package net.majorkernelpanic.screening.audio;

import net.majorkernelpanic.screening.MediaStream;

import android.media.MediaRecorder;
import android.os.ParcelFileDescriptor;
import android.util.Log;

import java.io.FileDescriptor;
import java.io.IOException;
import java.io.InputStream;

/**
 * Don't use this class directly.
 */
public abstract class AudioStream  extends MediaStream {

  protected int mAudioSource;
  protected int mOutputFormat;
  protected int mAudioEncoder;
  protected AudioQuality mRequestedQuality = AudioQuality.DEFAULT_AUDIO_QUALITY.clone();
  protected AudioQuality mQuality = mRequestedQuality.clone();

  public AudioStream() {
    setAudioSource(MediaRecorder.AudioSource.MIC);
  }

  public void setAudioSource(int audioSource) {
    mAudioSource = audioSource;
  }

  public void setAudioQuality(AudioQuality quality) {
    mRequestedQuality = quality;
  }

  /**
   * Returns the quality of the stream.
   */
  public AudioQuality getAudioQuality() {
    return mQuality;
  }

  protected void setAudioEncoder(int audioEncoder) {
    mAudioEncoder = audioEncoder;
  }

  protected void setOutputFormat(int outputFormat) {
    mOutputFormat = outputFormat;
  }

  public synchronized void configure() throws IllegalStateException, IOException {
    super.configure();
    mQuality = mRequestedQuality.clone();
  }

  @Override
  protected void encodeWithMediaRecorder() throws IOException {
    // We need a local socket to forward data output by the microphone to the packetizer
    createSockets();

    Log.v(TAG,"Requested audio with "+mQuality.bitRate/1000+"kbps"+" at "+mQuality.samplingRate/1000+"kHz");

    mMediaRecorder = new MediaRecorder();
    mMediaRecorder.setAudioSource(mAudioSource);
    mMediaRecorder.setOutputFormat(mOutputFormat);
    mMediaRecorder.setAudioEncoder(mAudioEncoder);
    mMediaRecorder.setAudioChannels(1);
    mMediaRecorder.setAudioSamplingRate(mQuality.samplingRate);
    mMediaRecorder.setAudioEncodingBitRate(mQuality.bitRate);

    // We write the output of the microphone in a local socket instead of a file !
    // This one little trick makes streaming feasible quiet simply: data from the microphone
    // can then be manipulated at the other end of the socket
    FileDescriptor fd = null;
    if (sPipeApi == PIPE_API_PFD) {
      fd = mParcelWrite.getFileDescriptor();
    } else  {
      fd = mSender.getFileDescriptor();
    }
    mMediaRecorder.setOutputFile(fd);
    mMediaRecorder.setOutputFile(fd);

    mMediaRecorder.prepare();
    mMediaRecorder.start();

    InputStream is = null;

    if (sPipeApi == PIPE_API_PFD) {
      is = new ParcelFileDescriptor.AutoCloseInputStream(mParcelRead);
    } else  {
      try {
        // mReceiver.getInputStream contains the data from the microphone
        is = mReceiver.getInputStream();
      } catch (IOException e) {
        stop();
        throw new IOException("Something happened with the local sockets :/ Start failed !");
      }
    }

    // the mPacketizer encapsulates this stream in an RTP stream and send it over the network
    mPacketizer.setInputStream(is);
    mPacketizer.start();
  }
}
